Indicating device.



PATENTED OGT. 20,1903.

- W. R. THOMPSON.

INDIGATING DEVICE.

APPLICATION FILED APR. 2. 1903.-

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INVENTOH [02 [12am 7?. ram vao'rz A ORNEY m: NQRfiIS PETERS co. moron-ma. wnsmmzmn. u. c.

To all whom it may concern:

V dicating Devices, of which the following is a clear, full, and exact description.

the plug, so that it may be inserted through,

sired.

UNITED STATES v V Patented October 20, 1903.7

PATENT OFFICE.

WILLIAM'R. THOMPSON, OF SOUTH NORWALK, CONNECTICUT, ASSIGNOR TO GEORGE N. MCKIBBIN, OF SOUTH NORWALK, CONNECTICUT.

IN DICATICNVG DEVICE.

SPECIFICATION formingpart of Letters Patent No. 742,099, dated October 20, 1903.

Application filed April 2, 1903. Serial No. 150,714. (No model.)

Belt known that I,W1LLIAM R. THOMPSON, a citizen of the United States, residing at South Norwalk, Connecticut, have invented certain new and useful Improvements in In- My invention relates to a fluid-indicating device; and my object is to provide a construction which will automatically indicate the direction of flow of a current in a pipe.

My invention will be defined in the claims.

In the drawings, which show the preferred embodiment of my invention, Figure 1 is a side elevation, partly in section on the line w a: of Fig. 2; and Fig. 2 is a plan view.

In the preferred embodiment illustrated, A is a plug, screw-threaded at'one end, as shown, and adapted to be screwed into a hole in a pipe or coupling B in which a current of fluid flows. The plug has a hole C therein, preferably -entirely through the plug, asshown. D is a rotatable shaft located in said hole and preferably projecting from both ends of said plug. E is a vane attached to and standing laterally of the projecting lower end of said shaft. The vane preferably does not project laterally beyond said threads of said hole while in place on the plug and without the necessity of adjusting it or attaching it after the plug has been screwed into place.

F is a coiled spring attached at one end to shaft D and at the other end adjustably fixed in a slot in a post G, fixed to a plate H, fastened to the upper end of the plug. This spring holds the vane in position laterally of the axis of the pipe, as shown, while allowing it to move in either direction.

K is a dial carried by plate H, and L is a pointer which is connected with the same, so as to be moved with the same, and is prefer-V ably fixed on shaft D itself, as shown. Graduations may be provided on the dial, as shown, if desired; but these are not essential.

M is a set-screw for adjustably fixing the pointer to the shaft, and n is a hub adjust ably fixed on the shaft by screw N, to which onev end of the spring is attached. A glasscovered casing R may be provided, it dopointer will also automatically indicate the strength of the flow and roughly the amount of water passing through the pipe in a given time.

' This indicator is useful in many'places, but particularly in the pipe leading from the injector-pump of a boiler, as it automatically indicates to the engineer whether or not the pump is working properly and the boiler is being supplied with a proper amount of water. V 7o I am. aware that many variations from the construction shown maybe made without departing from my invention as claimed, and I therefore do not limit myself to the particular embodiment illustrated and described herein.

What I claim isr 1. In a fluid-indicating device in combination, a plug screw-threaded at one end and I adapted to be screwed intoa pipe and having a hole therein, a shaft located and rotatable in said hole and projecting from the threaded end of said plug, a vane attached to and standing laterally of said projecting end, a spring resiliently holding said vane in one position, and a pointer connected with said shaft and moved by said vane.

2. In a fluid-indicating device in combination, a pipe having a screw-threaded hole therein, a plug screw-threaded at one end and screwed into said hole, said plug having a hole therein, a shaft located and rotatable in said latter hole andprojecting from the threaded endof said plug, a vane attached to and standing laterally of said projecting 5 end, a spring resiliently holding said vane in position laterally of the axis of said pipe, and a pointer connected with said shaft and moved by said vane.

3. In a fluid-indicating device in combinamo tion, a plug adapted to be inserted atits lower end into a hole in a pipe and having a hole therein, a shaft located and rotatable in said hole in said plug and projecting from said lower end thereof, a vane attached to and standing laterally of said projecting end and 5 not projecting laterally beyond the side of said plug, a spring resiliently holding said vane in one position, and a pointer connected with said shaft and moved by said vane.

4. In a fluid-indicating device in combina- 10 tion, a plug screw-threaded at one end and adapted to be screwed into a pipe, said plug having a hole through the same from end to end, a rotatable shaft located in said hole and projecting from both ends of said plug, a I5 vane attached to the end of said shaft which 

